difference in difference

  1. S

    Propensity Score Matching and difference-in-difference

    Hello, I am currently writing my thesis and am a little confused about the approach. I am supposed to do a difference in difference estimation combined with propensity score matching. I think I do understand both methods in a medical Kontext with a treatment and control group. However, mine...
  2. M

    Difference in Difference Method

    Hi guys! For some research we ran a regression analysis in Stata using the Difference in Difference method. this method uses a controlling group of countries to neutralise other effects than the effect of change in regulations. Afterwards we manipulated the data deviding it through year 2011...
  3. H

    Difference-in-differences in Health Economics Research

    Hi, I'm doing a difference-in-differences analysis of a health policy intervention. Health clinics are paid for the percentage of eligible patients who they give the right treatment to. The clinics are measured/paid separately for each type of treatment indicator. One year, some of the...
  4. G

    significance of difference across genders between changes in two conditions

    I would like to find out whether measured biological changes in a disease condition compared to a healthy control condition differ significantly between the two genders. So instead of classical approaches for testing the significance of the difference between two conditions, I would need to...
  5. kiton

    Unusual distribution of the continuous outcome

    Hello dear forum members! I am seeking your guidance with the following issue. So, I am estimating a "classic" difference-in-difference model (using pooled OLS estimator): Y = time + treated + time*treated, where Y is the average Medicare payment (amp) in $. Here is the descriptive...
  6. V

    Diff in Diff -> what is the minimum amount of treated observations?

    Can I use Diff in Diff when I only have a single treated observation? The case is that I observe the changes of a tax reform on real estate sales on the real estate prices (measured by an index). If I used the Index as my dependent variable I do not fulfill the 3rd assumption of the OLS, as...
  7. E

    Difference-in-difference regression

    Hello, I have a problem with my current research project and I am not very experienced with statistics so it would be great to find some help here! I have performance data of companies which can be categorized into two different groups (state-owned, not state-owned). Now I would like to...